论文部分内容阅读
为了研究斜拉桥在满堂支架分段拆除的塔梁同步施工过程中主梁、主塔和斜拉索等结构力学性能的变化,通过Midas/Civil(multitier distributed applications services/Civil)有限元分析软件,实现了斜拉桥施工过程的结构力学性能计算分析。依托亚洲最大转体重量斜拉桥—邹城斜拉桥(主跨为110 m+110 m独塔双柱双跨双索面混凝土斜拉桥)为背景开展研究,采用弹性受压连接单元模拟满堂支架,空间梁单元模拟主梁、主塔,考虑现场实际施工过程,开展了邹城斜拉桥结构受力和变形的数值计算。对比分析了数值计算结果与现场实测数据分析结果。结果表明:拆除满堂支架前后,支架支反力计算值最大增加382 k N,斜拉索索力计算最大变化值占该索索力的0.96%,实测索力最大变化值占该索索力的1.67%,主梁线型实测最大变化值为-7 mm。斜拉桥主梁相应节段的斜拉索张拉完成,是满堂支架分段拆除的塔梁同步施工应用于现场的前提条件。
In order to study the mechanical and structural changes of the main girder, main tower and stay cable during the simultaneous construction of the tower girder of the full-span stand with demolitions, the finite element analysis software Midas / Civil (multitier distributed applications services / Civil) , To achieve the construction of the cable-stayed bridge structural mechanics performance calculation and analysis. Relying on Asia’s largest swivel cable stayed bridge - Zoucheng cable-stayed bridge (the main span of 110 m + 110 m single tower double-column double-deck double-cable double-catenary concrete cable-stayed bridge) as the background to study the use of elastic compression connection unit simulation Full support, space beam element simulation of the main beam, the main tower, taking into account the actual construction process of the site, carried out Zoucheng cable-stayed bridge structure and deformation of the numerical calculation. The results of numerical calculation and field measurement data are compared and analyzed. The results show that the calculated maximum value of support force increases by 382 kN before and after the full support is removed, the maximum change of cable tension force accounts for 0.96% of the cable tension, and the maximum change of measured cable force takes 1.67% of the cable force. The maximum variation of the girder line measurement is -7 mm. Cable-stayed bridge girder corresponding segment of the cable stayed in tension, is full of stents demolition of the tower girder simultaneous construction applied to the site preconditions.